1113644 has 24 divisors (see below), whose sum is σ = 2300928. Its totient is φ = 461520.

The previous prime is 1113643. The next prime is 1113667. The reversal of 1113644 is 4463111.

It is not an unprimeable number, because it can be changed into a prime (1113643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227 + ... + 1509.

It is an arithmetic number, because the mean of its divisors is an integer number (95872).

2^1113644 is an apocalyptic number.

1113644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1113644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1150464).

1113644 is an abundant number, since it is smaller than the sum of its proper divisors (1187284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1113644 is a wasteful number, since it uses less digits than its factorization.

1113644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325 (or 1323 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 1113644 is about 1055.2933241521. The cubic root of 1113644 is about 103.6530598841.

Adding to 1113644 its reverse (4463111), we get a palindrome (5576755).

It can be divided in two parts, 11136 and 44, that multiplied together give a palindrome (489984).

The spelling of 1113644 in words is "one million, one hundred thirteen thousand, six hundred forty-four".